Most reputable biographical and film-industry sources list Josh Brolin at about 5 feet 10 inches to 5 feet 10½ inches tall. This puts him slightly above average height for an American man.
Reported official height
Several established biography sources state that Brolin is 5 feet 10 inches tall, which is about 178 centimeters. Industry databases that include detailed personal stats sometimes give a slightly more specific figure of 5 feet 10½ inches, or roughly 1.79 meters.
Why there is debate
Fans sometimes speculate that he might be a bit shorter or taller because his strong build and camera angles can make him look closer to 6 feet on screen. Informal discussions online often mention estimates around 5'9"–5'10", but these are anecdotal and less reliable than long-standing biographical references.
Best overall estimate
Taking the consistent figures from major biographical and industry sources together, the most realistic answer is that Josh Brolin is right around 5'10" (178–179 cm) in height. This fits with both official listings and how he appears next to co-stars of known heights.